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Title: fix: `handle_sse_response` causing dangling client's read_stream by ivanbelenky · Pull Request #1812 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix: `handle_sse_response` causing dangling client's read_stream by ivanbelenky · Pull Request #1812 · modelcontextprotocol/python-sdk

X Title: fix: `handle_sse_response` causing dangling client's read_stream by ivanbelenky · Pull Request #1812 · modelcontextprotocol/python-sdk

Description: Notifying session layer on transport error. Sending the error to the client's read_stream_writer. Motivation and Context Indefinitely hang described on issue #1811 How Has This Been Tested? Running suite of tests locally as per contribution guidelines. Breaking Changes Types of changes Bug fix (non-breaking change which fixes an issue) New feature (non-breaking change which adds functionality) Breaking change (fix or feature that would cause existing functionality to change) Documentation update Checklist I have read the MCP Documentation My code follows the repository's style guidelines New and existing tests pass locally I have added appropriate error handling I have added or updated documentation as needed Additional context

Open Graph Description: Notifying session layer on transport error. Sending the error to the client's read_stream_writer. Motivation and Context Indefinitely hang described on issue #1811 How Has This Been Tested? Run...

X Description: Notifying session layer on transport error. Sending the error to the client's read_stream_writer. Motivation and Context Indefinitely hang described on issue #1811 How Has This Been Tested?...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/1812

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fix: handle_sse_response causing dangling client's read_stream https://github.com/modelcontextprotocol/python-sdk/pull/1812/files#top
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86ef957 draft commit of solution to issue #1811 ivanbelenky Dec 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1812/commits/86ef9575475f3579a25f62442ca0c70ffa3009b5
4419464 pragma no cover and standard error message ivanbelenky Dec 21, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1812/commits/441946434a7ec6c6fa6452f0f13141f56152ed18
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